I'm referring here to Instagram / Facebook. How are you going to send your wedding or vacation or dog photos to your network? Mass email? The social platforms have a utility for most people at this point.
I, for one, would love to see the existing incumbents fail, and a mad scramble by upstarts to do this better. This could be done way, way, way better, and I would love to see what happened if the network effect got out of the way of that happening.
I quit all social media and gave up my smartphone. I don't miss that brief "huh, that's nice" moment when being seeing an acquaintance's random photo they felt they had to share, and moments when visual imagery are shared now feel much more special.
If they have an utility, people will pay for it (they don't even have to pay as much as they pay indirectly via advertising).
If not, not gonna miss it